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Finding the Fourth Proportional to 136,165.50, 187,908.39 and 76,549.50

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Solution

The fourth proportional to 136,165.50, 187,908.39 and 76,549.50 is: 105,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,165.50 : 187,908.39 = 76,549.50 : x
  2. Step 2: Convert to fraction form
    136,165.50/187,908.39 = 76,549.50/x
  3. Step 3: Cross multiply
    136,165.50x = 187,908.39 × 76,549.50
  4. Step 4: Simplify right side
    136,165.50x = 14,384,293,300.31
  5. Step 5: Solve for x
    x = 14,384,293,300.31/136,165.50
  6. Step 6: Final answer
    x = 105,638.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.